Baby couldn’t tell parents about abusive sitter, but his dog could.

This story is a perfect example of why you should pay attention to your pets behavior.

A family dog alerted his owners to a babysitter that was abusing their 7-month-old son. The babysitter had passed a background check but now she’s behind bars.

When Alexis Khan, 22, came around their son, Finn, their German Shepard mix would become very hostile. He would growl, bark, the hair on his neck would stand up and get between Finn and the babysitter.

One day while Khan was babysitting, the parents hid an iPhone under a couch to record audio. Khan can be heard cursing at Finn and what sounds to be slapping. Finn can be heard crying, too.